That means he is ramp, life gain, removal, and a tribal leader in one body
While its been banned in Modern and fallen off slightly in Legacy and Vintage, its still one of the most powerful cards in Commander, so much so that many decks are built entirely around sticking a Birthing Pod
For example, if you control Traveling Chocobo ("You may play lands and cast Bird spells from the top of your library.") and Jidoor, Aristocratic Capital is on top of your library, you can play Jidoor, Aristocratic Capital, but you can't cast Overture
It looks really nice, and is available on the showcase version of every three-colour card in the set
Set Information: Unlimited The Unlimited was released on December 1st, 1993 , only two months after the release of the Limited Edition Beta in October
Pantlaza, Sun-Favored does this from a Dinosaur kindred angle, using some mild kindred effects but mostly focusing on creatures that are powerful in a vacuum